EDR: Investigation & Response
Understanding the Concept
Endpoint Detection and Response (EDR) in Defender for Endpoint provides deep visibility into endpoint activity through behavioral sensors, cloud analytics, and threat intelligence. It captures process creation, network connections, file modifications, registry changes, and more.
The device timeline shows a chronological view of all activities on an endpoint, allowing analysts to trace an attack from initial access through lateral movement to data exfiltration. Advanced filtering helps focus on suspicious behaviors.
Response actions include isolating the device from the network, running antivirus scans, collecting investigation packages, restricting app execution, and initiating live response sessions for manual investigation.
Key Points
- EDR captures comprehensive endpoint telemetry
- Device timeline shows chronological activity view
- Alert evidence includes process trees and file details
- Response actions: isolate, scan, collect package, restrict apps, live response
- Live response enables remote investigation and remediation
EDR Investigation Flow
Alert
Behavioral detection triggers alert
Timeline
Review device activity chronologically
Evidence
Examine process trees and file artifacts
Response
Isolate, remediate, and recover
Why This Matters in Real Organizations
EDR provides the forensic depth needed to understand exactly what happened on an endpoint during an attack. Without EDR, analysts rely on limited antivirus logs and miss sophisticated attack techniques.
Common Mistakes to Avoid
Interview Tips
- Walk through your endpoint investigation methodology
- Discuss specific response actions and when to use each
Exam Tips (SC-200)
- Know all EDR response actions and their effects
- Understand device timeline navigation
- Know how to use live response for investigation
Course Complete!
You've finished all lessons